real quick, is my sprint tp2 a cdma or gsm

[DJ_SirG]

NO no no... The Sprint TP2 is NOT a CDMA phone. The Sprint Touch Pro2 (like all TP2's on all networks) is a WORLD phone. The TP2 is CDMA AND QUAD band GSM.
You can take it a step further and check the chip set on the TP2 from T-Mobile and AT&T you will see they are Quad band GSM AND CDMA making them a world phone. If you want to know if you can put your friends SIM card in and use the device the answer is yes but ONLY if you have unlocked the SIM. Sprint and Verizon have SIM Locke's so the device wont let you use a SIM that is not from there network.

For the people that are going to post after me.....
The answer is YES the Verizon and Sprint TP2 can be used in the United States on the GSM networks. It was true in the past that CDMA devices with GSM chips could only use GSM outside the U.S. Them devices where NOT Quad Band and only use 2 of the 4 MHz provided to the GSM network.